eclass/toolchain-funcs.eclass

   1 # Copyright 1999-2015 Gentoo Foundation
   2 # Distributed under the terms of the GNU General Public License v2
   3 # $Id$
   4
   5 # @ECLASS: toolchain-funcs.eclass
   6 # @MAINTAINER:
   7 # Toolchain Ninjas <toolchain@gentoo.org>
   8 # @BLURB: functions to query common info about the toolchain
   9 # @DESCRIPTION:
  10 # The toolchain-funcs aims to provide a complete suite of functions
  11 # for gleaning useful information about the toolchain and to simplify
  12 # ugly things like cross-compiling and multilib.  All of this is done
  13 # in such a way that you can rely on the function always returning
  14 # something sane.
  15
  16 if [[ -z ${_TOOLCHAIN_FUNCS_ECLASS} ]]; then
  17 _TOOLCHAIN_FUNCS_ECLASS=1
  18
  19 inherit multilib
  20
  21 # tc-getPROG <VAR [search vars]> <default> [tuple]
  22 _tc-getPROG() {
  23         local tuple=$1
  24         local v var vars=$2
  25         local prog=$3
  26
  27         var=${vars%% *}
  28         for v in ${vars} ; do
  29                 if [[ -n ${!v} ]] ; then
  30                         export ${var}="${!v}"
  31                         echo "${!v}"
  32                         return 0
  33                 fi
  34         done
  35
  36         local search=
  37         [[ -n $4 ]] && search=$(type -p "$4-${prog}")
  38         [[ -z ${search} && -n ${!tuple} ]] && search=$(type -p "${!tuple}-${prog}")
  39         [[ -n ${search} ]] && prog=${search##*/}
  40
  41         export ${var}=${prog}
  42         echo "${!var}"
  43 }
  44 tc-getBUILD_PROG() { _tc-getPROG CBUILD "BUILD_$1 $1_FOR_BUILD HOST$1" "${@:2}"; }
  45 tc-getPROG() { _tc-getPROG CHOST "$@"; }
  46
  47 # @FUNCTION: tc-getAR
  48 # @USAGE: [toolchain prefix]
  49 # @RETURN: name of the archiver
  50 tc-getAR() { tc-getPROG AR ar "$@"; }
  51 # @FUNCTION: tc-getAS
  52 # @USAGE: [toolchain prefix]
  53 # @RETURN: name of the assembler
  54 tc-getAS() { tc-getPROG AS as "$@"; }
  55 # @FUNCTION: tc-getCC
  56 # @USAGE: [toolchain prefix]
  57 # @RETURN: name of the C compiler
  58 tc-getCC() { tc-getPROG CC gcc "$@"; }
  59 # @FUNCTION: tc-getCPP
  60 # @USAGE: [toolchain prefix]
  61 # @RETURN: name of the C preprocessor
  62 tc-getCPP() { tc-getPROG CPP cpp "$@"; }
  63 # @FUNCTION: tc-getCXX
  64 # @USAGE: [toolchain prefix]
  65 # @RETURN: name of the C++ compiler
  66 tc-getCXX() { tc-getPROG CXX g++ "$@"; }
  67 # @FUNCTION: tc-getLD
  68 # @USAGE: [toolchain prefix]
  69 # @RETURN: name of the linker
  70 tc-getLD() { tc-getPROG LD ld "$@"; }
  71 # @FUNCTION: tc-getSTRIP
  72 # @USAGE: [toolchain prefix]
  73 # @RETURN: name of the strip program
  74 tc-getSTRIP() { tc-getPROG STRIP strip "$@"; }
  75 # @FUNCTION: tc-getNM
  76 # @USAGE: [toolchain prefix]
  77 # @RETURN: name of the symbol/object thingy
  78 tc-getNM() { tc-getPROG NM nm "$@"; }
  79 # @FUNCTION: tc-getRANLIB
  80 # @USAGE: [toolchain prefix]
  81 # @RETURN: name of the archiver indexer
  82 tc-getRANLIB() { tc-getPROG RANLIB ranlib "$@"; }
  83 # @FUNCTION: tc-getOBJCOPY
  84 # @USAGE: [toolchain prefix]
  85 # @RETURN: name of the object copier
  86 tc-getOBJCOPY() { tc-getPROG OBJCOPY objcopy "$@"; }
  87 # @FUNCTION: tc-getOBJDUMP
  88 # @USAGE: [toolchain prefix]
  89 # @RETURN: name of the object dumper
  90 tc-getOBJDUMP() { tc-getPROG OBJDUMP objdump "$@"; }
  91 # @FUNCTION: tc-getF77
  92 # @USAGE: [toolchain prefix]
  93 # @RETURN: name of the Fortran 77 compiler
  94 tc-getF77() { tc-getPROG F77 gfortran "$@"; }
  95 # @FUNCTION: tc-getFC
  96 # @USAGE: [toolchain prefix]
  97 # @RETURN: name of the Fortran 90 compiler
  98 tc-getFC() { tc-getPROG FC gfortran "$@"; }
  99 # @FUNCTION: tc-getGCJ
 100 # @USAGE: [toolchain prefix]
 101 # @RETURN: name of the java compiler
 102 tc-getGCJ() { tc-getPROG GCJ gcj "$@"; }
 103 # @FUNCTION: tc-getGO
 104 # @USAGE: [toolchain prefix]
 105 # @RETURN: name of the Go compiler
 106 tc-getGO() { tc-getPROG GO gccgo "$@"; }
 107 # @FUNCTION: tc-getPKG_CONFIG
 108 # @USAGE: [toolchain prefix]
 109 # @RETURN: name of the pkg-config tool
 110 tc-getPKG_CONFIG() { tc-getPROG PKG_CONFIG pkg-config "$@"; }
 111 # @FUNCTION: tc-getRC
 112 # @USAGE: [toolchain prefix]
 113 # @RETURN: name of the Windows resource compiler
 114 tc-getRC() { tc-getPROG RC windres "$@"; }
 115 # @FUNCTION: tc-getDLLWRAP
 116 # @USAGE: [toolchain prefix]
 117 # @RETURN: name of the Windows dllwrap utility
 118 tc-getDLLWRAP() { tc-getPROG DLLWRAP dllwrap "$@"; }
 119
 120 # @FUNCTION: tc-getBUILD_AR
 121 # @USAGE: [toolchain prefix]
 122 # @RETURN: name of the archiver for building binaries to run on the build machine
 123 tc-getBUILD_AR() { tc-getBUILD_PROG AR ar "$@"; }
 124 # @FUNCTION: tc-getBUILD_AS
 125 # @USAGE: [toolchain prefix]
 126 # @RETURN: name of the assembler for building binaries to run on the build machine
 127 tc-getBUILD_AS() { tc-getBUILD_PROG AS as "$@"; }
 128 # @FUNCTION: tc-getBUILD_CC
 129 # @USAGE: [toolchain prefix]
 130 # @RETURN: name of the C compiler for building binaries to run on the build machine
 131 tc-getBUILD_CC() { tc-getBUILD_PROG CC gcc "$@"; }
 132 # @FUNCTION: tc-getBUILD_CPP
 133 # @USAGE: [toolchain prefix]
 134 # @RETURN: name of the C preprocessor for building binaries to run on the build machine
 135 tc-getBUILD_CPP() { tc-getBUILD_PROG CPP cpp "$@"; }
 136 # @FUNCTION: tc-getBUILD_CXX
 137 # @USAGE: [toolchain prefix]
 138 # @RETURN: name of the C++ compiler for building binaries to run on the build machine
 139 tc-getBUILD_CXX() { tc-getBUILD_PROG CXX g++ "$@"; }
 140 # @FUNCTION: tc-getBUILD_LD
 141 # @USAGE: [toolchain prefix]
 142 # @RETURN: name of the linker for building binaries to run on the build machine
 143 tc-getBUILD_LD() { tc-getBUILD_PROG LD ld "$@"; }
 144 # @FUNCTION: tc-getBUILD_STRIP
 145 # @USAGE: [toolchain prefix]
 146 # @RETURN: name of the strip program for building binaries to run on the build machine
 147 tc-getBUILD_STRIP() { tc-getBUILD_PROG STRIP strip "$@"; }
 148 # @FUNCTION: tc-getBUILD_NM
 149 # @USAGE: [toolchain prefix]
 150 # @RETURN: name of the symbol/object thingy for building binaries to run on the build machine
 151 tc-getBUILD_NM() { tc-getBUILD_PROG NM nm "$@"; }
 152 # @FUNCTION: tc-getBUILD_RANLIB
 153 # @USAGE: [toolchain prefix]
 154 # @RETURN: name of the archiver indexer for building binaries to run on the build machine
 155 tc-getBUILD_RANLIB() { tc-getBUILD_PROG RANLIB ranlib "$@"; }
 156 # @FUNCTION: tc-getBUILD_OBJCOPY
 157 # @USAGE: [toolchain prefix]
 158 # @RETURN: name of the object copier for building binaries to run on the build machine
 159 tc-getBUILD_OBJCOPY() { tc-getBUILD_PROG OBJCOPY objcopy "$@"; }
 160 # @FUNCTION: tc-getBUILD_PKG_CONFIG
 161 # @USAGE: [toolchain prefix]
 162 # @RETURN: name of the pkg-config tool for building binaries to run on the build machine
 163 tc-getBUILD_PKG_CONFIG() { tc-getBUILD_PROG PKG_CONFIG pkg-config "$@"; }
 164
 165 # @FUNCTION: tc-export
 166 # @USAGE: <list of toolchain variables>
 167 # @DESCRIPTION:
 168 # Quick way to export a bunch of compiler vars at once.
 169 tc-export() {
 170         local var
 171         for var in "$@" ; do
 172                 [[ $(type -t tc-get${var}) != "function" ]] && die "tc-export: invalid export variable '${var}'"
 173                 eval tc-get${var} > /dev/null
 174         done
 175 }
 176
 177 # @FUNCTION: tc-is-cross-compiler
 178 # @RETURN: Shell true if we are using a cross-compiler, shell false otherwise
 179 tc-is-cross-compiler() {
 180         [[ ${CBUILD:-${CHOST}} != ${CHOST} ]]
 181 }
 182
 183 # @FUNCTION: tc-is-softfloat
 184 # @DESCRIPTION:
 185 # See if this toolchain is a softfloat based one.
 186 # @CODE
 187 # The possible return values:
 188 #  - only:   the target is always softfloat (never had fpu)
 189 #  - yes:    the target should support softfloat
 190 #  - softfp: (arm specific) the target should use hardfloat insns, but softfloat calling convention
 191 #  - no:     the target doesn't support softfloat
 192 # @CODE
 193 # This allows us to react differently where packages accept
 194 # softfloat flags in the case where support is optional, but
 195 # rejects softfloat flags where the target always lacks an fpu.
 196 tc-is-softfloat() {
 197         local CTARGET=${CTARGET:-${CHOST}}
 198         case ${CTARGET} in
 199                 bfin*|h8300*)
 200                         echo "only" ;;
 201                 *)
 202                         if [[ ${CTARGET//_/-} == *-softfloat-* ]] ; then
 203                                 echo "yes"
 204                         elif [[ ${CTARGET//_/-} == *-softfp-* ]] ; then
 205                                 echo "softfp"
 206                         else
 207                                 echo "no"
 208                         fi
 209                         ;;
 210         esac
 211 }
 212
 213 # @FUNCTION: tc-is-static-only
 214 # @DESCRIPTION:
 215 # Return shell true if the target does not support shared libs, shell false
 216 # otherwise.
 217 tc-is-static-only() {
 218         local host=${CTARGET:-${CHOST}}
 219
 220         # *MiNT doesn't have shared libraries, only platform so far
 221         [[ ${host} == *-mint* ]]
 222 }
 223
 224 # @FUNCTION: tc-export_build_env
 225 # @USAGE: [compiler variables]
 226 # @DESCRIPTION:
 227 # Export common build related compiler settings.
 228 tc-export_build_env() {
 229         tc-export "$@"
 230         # Some build envs will initialize vars like:
 231         # : ${BUILD_LDFLAGS:-${LDFLAGS}}
 232         # So make sure all variables are non-empty. #526734
 233         : ${BUILD_CFLAGS:=-O1 -pipe}
 234         : ${BUILD_CXXFLAGS:=-O1 -pipe}
 235         : ${BUILD_CPPFLAGS:= }
 236         : ${BUILD_LDFLAGS:= }
 237         export BUILD_{C,CXX,CPP,LD}FLAGS
 238
 239         # Some packages use XXX_FOR_BUILD.
 240         local v
 241         for v in BUILD_{C,CXX,CPP,LD}FLAGS ; do
 242                 export ${v#BUILD_}_FOR_BUILD="${!v}"
 243         done
 244 }
 245
 246 # @FUNCTION: tc-env_build
 247 # @USAGE: <command> [command args]
 248 # @INTERNAL
 249 # @DESCRIPTION:
 250 # Setup the compile environment to the build tools and then execute the
 251 # specified command.  We use tc-getBUILD_XX here so that we work with
 252 # all of the semi-[non-]standard env vars like $BUILD_CC which often
 253 # the target build system does not check.
 254 tc-env_build() {
 255         tc-export_build_env
 256         CFLAGS=${BUILD_CFLAGS} \
 257         CXXFLAGS=${BUILD_CXXFLAGS} \
 258         CPPFLAGS=${BUILD_CPPFLAGS} \
 259         LDFLAGS=${BUILD_LDFLAGS} \
 260         AR=$(tc-getBUILD_AR) \
 261         AS=$(tc-getBUILD_AS) \
 262         CC=$(tc-getBUILD_CC) \
 263         CPP=$(tc-getBUILD_CPP) \
 264         CXX=$(tc-getBUILD_CXX) \
 265         LD=$(tc-getBUILD_LD) \
 266         NM=$(tc-getBUILD_NM) \
 267         PKG_CONFIG=$(tc-getBUILD_PKG_CONFIG) \
 268         RANLIB=$(tc-getBUILD_RANLIB) \
 269         "$@"
 270 }
 271
 272 # @FUNCTION: econf_build
 273 # @USAGE: [econf flags]
 274 # @DESCRIPTION:
 275 # Sometimes we need to locally build up some tools to run on CBUILD because
 276 # the package has helper utils which are compiled+executed when compiling.
 277 # This won't work when cross-compiling as the CHOST is set to a target which
 278 # we cannot natively execute.
 279 #
 280 # For example, the python package will build up a local python binary using
 281 # a portable build system (configure+make), but then use that binary to run
 282 # local python scripts to build up other components of the overall python.
 283 # We cannot rely on the python binary in $PATH as that often times will be
 284 # a different version, or not even installed in the first place.  Instead,
 285 # we compile the code in a different directory to run on CBUILD, and then
 286 # use that binary when compiling the main package to run on CHOST.
 287 #
 288 # For example, with newer EAPIs, you'd do something like:
 289 # @CODE
 290 # src_configure() {
 291 #       ECONF_SOURCE=${S}
 292 #       if tc-is-cross-compiler ; then
 293 #               mkdir "${WORKDIR}"/${CBUILD}
 294 #               pushd "${WORKDIR}"/${CBUILD} >/dev/null
 295 #               econf_build --disable-some-unused-stuff
 296 #               popd >/dev/null
 297 #       fi
 298 #       ... normal build paths ...
 299 # }
 300 # src_compile() {
 301 #       if tc-is-cross-compiler ; then
 302 #               pushd "${WORKDIR}"/${CBUILD} >/dev/null
 303 #               emake one-or-two-build-tools
 304 #               ln/mv build-tools to normal build paths in ${S}/
 305 #               popd >/dev/null
 306 #       fi
 307 #       ... normal build paths ...
 308 # }
 309 # @CODE
 310 econf_build() {
 311         local CBUILD=${CBUILD:-${CHOST}}
 312         tc-env_build econf --build=${CBUILD} --host=${CBUILD} "$@"
 313 }
 314
 315 # @FUNCTION: tc-ld-is-gold
 316 # @USAGE: [toolchain prefix]
 317 # @DESCRIPTION:
 318 # Return true if the current linker is set to gold.
 319 tc-ld-is-gold() {
 320         local out
 321
 322         # First check the linker directly.
 323         out=$($(tc-getLD "$@") --version 2>&1)
 324         if [[ ${out} == *"GNU gold"* ]] ; then
 325                 return 0
 326         fi
 327
 328         # Then see if they're selecting gold via compiler flags.
 329         # Note: We're assuming they're using LDFLAGS to hold the
 330         # options and not CFLAGS/CXXFLAGS.
 331         local base="${T}/test-tc-gold"
 332         cat <<-EOF > "${base}.c"
 333         int main() { return 0; }
 334         EOF
 335         out=$($(tc-getCC "$@") ${CFLAGS} ${CPPFLAGS} ${LDFLAGS} -Wl,--version "${base}.c" -o "${base}" 2>&1)
 336         rm -f "${base}"*
 337         if [[ ${out} == *"GNU gold"* ]] ; then
 338                 return 0
 339         fi
 340
 341         # No gold here!
 342         return 1
 343 }
 344
 345 # @FUNCTION: tc-ld-disable-gold
 346 # @USAGE: [toolchain prefix]
 347 # @DESCRIPTION:
 348 # If the gold linker is currently selected, configure the compilation
 349 # settings so that we use the older bfd linker instead.
 350 tc-ld-disable-gold() {
 351         if ! tc-ld-is-gold "$@" ; then
 352                 # They aren't using gold, so nothing to do!
 353                 return
 354         fi
 355
 356         ewarn "Forcing usage of the BFD linker instead of GOLD"
 357
 358         # Set up LD to point directly to bfd if it's available.
 359         # We need to extract the first word in case there are flags appended
 360         # to its value (like multilib).  #545218
 361         local ld=$(tc-getLD "$@")
 362         local bfd_ld="${ld%% *}.bfd"
 363         local path_ld=$(which "${bfd_ld}" 2>/dev/null)
 364         [[ -e ${path_ld} ]] && export LD=${bfd_ld}
 365
 366         # Set up LDFLAGS to select gold based on the gcc version.
 367         local major=$(gcc-major-version "$@")
 368         local minor=$(gcc-minor-version "$@")
 369         if [[ ${major} -lt 4 ]] || [[ ${major} -eq 4 && ${minor} -lt 8 ]] ; then
 370                 # <=gcc-4.7 requires some coercion.  Only works if bfd exists.
 371                 if [[ -e ${path_ld} ]] ; then
 372                         local d="${T}/bfd-linker"
 373                         mkdir -p "${d}"
 374                         ln -sf "${path_ld}" "${d}"/ld
 375                         export LDFLAGS="${LDFLAGS} -B${d}"
 376                 else
 377                         die "unable to locate a BFD linker to bypass gold"
 378                 fi
 379         else
 380                 # gcc-4.8+ supports -fuse-ld directly.
 381                 export LDFLAGS="${LDFLAGS} -fuse-ld=bfd"
 382         fi
 383 }
 384
 385 # @FUNCTION: tc-has-openmp
 386 # @USAGE: [toolchain prefix]
 387 # @DESCRIPTION:
 388 # See if the toolchain supports OpenMP.
 389 tc-has-openmp() {
 390         local base="${T}/test-tc-openmp"
 391         cat <<-EOF > "${base}.c"
 392         #include <omp.h>
 393         int main() {
 394                 int nthreads, tid, ret = 0;
 395                 #pragma omp parallel private(nthreads, tid)
 396                 {
 397                 tid = omp_get_thread_num();
 398                 nthreads = omp_get_num_threads(); ret += tid + nthreads;
 399                 }
 400                 return ret;
 401         }
 402         EOF
 403         $(tc-getCC "$@") -fopenmp "${base}.c" -o "${base}" >&/dev/null
 404         local ret=$?
 405         rm -f "${base}"*
 406         return ${ret}
 407 }
 408
 409 # @FUNCTION: tc-has-tls
 410 # @USAGE: [-s|-c|-l] [toolchain prefix]
 411 # @DESCRIPTION:
 412 # See if the toolchain supports thread local storage (TLS).  Use -s to test the
 413 # compiler, -c to also test the assembler, and -l to also test the C library
 414 # (the default).
 415 tc-has-tls() {
 416         local base="${T}/test-tc-tls"
 417         cat <<-EOF > "${base}.c"
 418         int foo(int *i) {
 419                 static __thread int j = 0;
 420                 return *i ? j : *i;
 421         }
 422         EOF
 423         local flags
 424         case $1 in
 425                 -s) flags="-S";;
 426                 -c) flags="-c";;
 427                 -l) ;;
 428                 -*) die "Usage: tc-has-tls [-c|-l] [toolchain prefix]";;
 429         esac
 430         : ${flags:=-fPIC -shared -Wl,-z,defs}
 431         [[ $1 == -* ]] && shift
 432         $(tc-getCC "$@") ${flags} "${base}.c" -o "${base}" >&/dev/null
 433         local ret=$?
 434         rm -f "${base}"*
 435         return ${ret}
 436 }
 437
 438
 439 # Parse information from CBUILD/CHOST/CTARGET rather than
 440 # use external variables from the profile.
 441 tc-ninja_magic_to_arch() {
 442 ninj() { [[ ${type} == "kern" ]] && echo $1 || echo $2 ; }
 443
 444         local type=$1
 445         local host=$2
 446         [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
 447
 448         local KV=${KV:-${KV_FULL}}
 449         [[ ${type} == "kern" ]] && [[ -z ${KV} ]] && \
 450         ewarn "QA: Kernel version could not be determined, please inherit kernel-2 or linux-info"
 451
 452         case ${host} in
 453                 aarch64*)       echo arm64;;
 454                 alpha*)         echo alpha;;
 455                 arm*)           echo arm;;
 456                 avr*)           ninj avr32 avr;;
 457                 bfin*)          ninj blackfin bfin;;
 458                 c6x*)           echo c6x;;
 459                 cris*)          echo cris;;
 460                 frv*)           echo frv;;
 461                 hexagon*)       echo hexagon;;
 462                 hppa*)          ninj parisc hppa;;
 463                 i?86*)
 464                         # Starting with linux-2.6.24, the 'x86_64' and 'i386'
 465                         # trees have been unified into 'x86'.
 466                         # FreeBSD still uses i386
 467                         if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -lt $(KV_to_int 2.6.24) || ${host} == *freebsd* ]] ; then
 468                                 echo i386
 469                         else
 470                                 echo x86
 471                         fi
 472                         ;;
 473                 ia64*)          echo ia64;;
 474                 m68*)           echo m68k;;
 475                 metag*)         echo metag;;
 476                 microblaze*)    echo microblaze;;
 477                 mips*)          echo mips;;
 478                 nios2*)         echo nios2;;
 479                 nios*)          echo nios;;
 480                 or32*)          echo openrisc;;
 481                 powerpc*)
 482                         # Starting with linux-2.6.15, the 'ppc' and 'ppc64' trees
 483                         # have been unified into simply 'powerpc', but until 2.6.16,
 484                         # ppc32 is still using ARCH="ppc" as default
 485                         if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.16) ]] ; then
 486                                 echo powerpc
 487                         elif [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -eq $(KV_to_int 2.6.15) ]] ; then
 488                                 if [[ ${host} == powerpc64* ]] || [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
 489                                         echo powerpc
 490                                 else
 491                                         echo ppc
 492                                 fi
 493                         elif [[ ${host} == powerpc64* ]] ; then
 494                                 echo ppc64
 495                         elif [[ ${PROFILE_ARCH} == "ppc64" ]] ; then
 496                                 ninj ppc64 ppc
 497                         else
 498                                 echo ppc
 499                         fi
 500                         ;;
 501                 riscv*)         echo riscv;;
 502                 s390*)          echo s390;;
 503                 score*)         echo score;;
 504                 sh64*)          ninj sh64 sh;;
 505                 sh*)            echo sh;;
 506                 sparc64*)       ninj sparc64 sparc;;
 507                 sparc*)         [[ ${PROFILE_ARCH} == "sparc64" ]] \
 508                                                 && ninj sparc64 sparc \
 509                                                 || echo sparc
 510                                         ;;
 511                 tile*)          echo tile;;
 512                 vax*)           echo vax;;
 513                 x86_64*freebsd*) echo amd64;;
 514                 x86_64*)
 515                         # Starting with linux-2.6.24, the 'x86_64' and 'i386'
 516                         # trees have been unified into 'x86'.
 517                         if [[ ${type} == "kern" ]] && [[ $(KV_to_int ${KV}) -ge $(KV_to_int 2.6.24) ]] ; then
 518                                 echo x86
 519                         else
 520                                 ninj x86_64 amd64
 521                         fi
 522                         ;;
 523                 xtensa*)        echo xtensa;;
 524
 525                 # since our usage of tc-arch is largely concerned with
 526                 # normalizing inputs for testing ${CTARGET}, let's filter
 527                 # other cross targets (mingw and such) into the unknown.
 528                 *)                      echo unknown;;
 529         esac
 530 }
 531 # @FUNCTION: tc-arch-kernel
 532 # @USAGE: [toolchain prefix]
 533 # @RETURN: name of the kernel arch according to the compiler target
 534 tc-arch-kernel() {
 535         tc-ninja_magic_to_arch kern "$@"
 536 }
 537 # @FUNCTION: tc-arch
 538 # @USAGE: [toolchain prefix]
 539 # @RETURN: name of the portage arch according to the compiler target
 540 tc-arch() {
 541         tc-ninja_magic_to_arch portage "$@"
 542 }
 543
 544 tc-endian() {
 545         local host=$1
 546         [[ -z ${host} ]] && host=${CTARGET:-${CHOST}}
 547         host=${host%%-*}
 548
 549         case ${host} in
 550                 aarch64*be)     echo big;;
 551                 aarch64)        echo little;;
 552                 alpha*)         echo big;;
 553                 arm*b*)         echo big;;
 554                 arm*)           echo little;;
 555                 cris*)          echo little;;
 556                 hppa*)          echo big;;
 557                 i?86*)          echo little;;
 558                 ia64*)          echo little;;
 559                 m68*)           echo big;;
 560                 mips*l*)        echo little;;
 561                 mips*)          echo big;;
 562                 powerpc*le)     echo little;;
 563                 powerpc*)       echo big;;
 564                 s390*)          echo big;;
 565                 sh*b*)          echo big;;
 566                 sh*)            echo little;;
 567                 sparc*)         echo big;;
 568                 x86_64*)        echo little;;
 569                 *)                      echo wtf;;
 570         esac
 571 }
 572
 573 # Internal func.  The first argument is the version info to expand.
 574 # Query the preprocessor to improve compatibility across different
 575 # compilers rather than maintaining a --version flag matrix. #335943
 576 _gcc_fullversion() {
 577         local ver="$1"; shift
 578         set -- `$(tc-getCPP "$@") -E -P - <<<"__GNUC__ __GNUC_MINOR__ __GNUC_PATCHLEVEL__"`
 579         eval echo "$ver"
 580 }
 581
 582 # @FUNCTION: gcc-fullversion
 583 # @RETURN: compiler version (major.minor.micro: [3.4.6])
 584 gcc-fullversion() {
 585         _gcc_fullversion '$1.$2.$3' "$@"
 586 }
 587 # @FUNCTION: gcc-version
 588 # @RETURN: compiler version (major.minor: [3.4].6)
 589 gcc-version() {
 590         _gcc_fullversion '$1.$2' "$@"
 591 }
 592 # @FUNCTION: gcc-major-version
 593 # @RETURN: major compiler version (major: [3].4.6)
 594 gcc-major-version() {
 595         _gcc_fullversion '$1' "$@"
 596 }
 597 # @FUNCTION: gcc-minor-version
 598 # @RETURN: minor compiler version (minor: 3.[4].6)
 599 gcc-minor-version() {
 600         _gcc_fullversion '$2' "$@"
 601 }
 602 # @FUNCTION: gcc-micro-version
 603 # @RETURN: micro compiler version (micro: 3.4.[6])
 604 gcc-micro-version() {
 605         _gcc_fullversion '$3' "$@"
 606 }
 607
 608 # Returns the installation directory - internal toolchain
 609 # function for use by _gcc-specs-exists (for flag-o-matic).
 610 _gcc-install-dir() {
 611         echo "$(LC_ALL=C $(tc-getCC) -print-search-dirs 2> /dev/null |\
 612                 awk '$1=="install:" {print $2}')"
 613 }
 614 # Returns true if the indicated specs file exists - internal toolchain
 615 # function for use by flag-o-matic.
 616 _gcc-specs-exists() {
 617         [[ -f $(_gcc-install-dir)/$1 ]]
 618 }
 619
 620 # Returns requested gcc specs directive unprocessed - for used by
 621 # gcc-specs-directive()
 622 # Note; later specs normally overwrite earlier ones; however if a later
 623 # spec starts with '+' then it appends.
 624 # gcc -dumpspecs is parsed first, followed by files listed by "gcc -v"
 625 # as "Reading <file>", in order.  Strictly speaking, if there's a
 626 # $(gcc_install_dir)/specs, the built-in specs aren't read, however by
 627 # the same token anything from 'gcc -dumpspecs' is overridden by
 628 # the contents of $(gcc_install_dir)/specs so the result is the
 629 # same either way.
 630 _gcc-specs-directive_raw() {
 631         local cc=$(tc-getCC)
 632         local specfiles=$(LC_ALL=C ${cc} -v 2>&1 | awk '$1=="Reading" {print $NF}')
 633         ${cc} -dumpspecs 2> /dev/null | cat - ${specfiles} | awk -v directive=$1 \
 634 'BEGIN  { pspec=""; spec=""; outside=1 }
 635 $1=="*"directive":"  { pspec=spec; spec=""; outside=0; next }
 636         outside || NF==0 || ( substr($1,1,1)=="*" && substr($1,length($1),1)==":" ) { outside=1; next }
 637         spec=="" && substr($0,1,1)=="+" { spec=pspec " " substr($0,2); next }
 638         { spec=spec $0 }
 639 END     { print spec }'
 640         return 0
 641 }
 642
 643 # Return the requested gcc specs directive, with all included
 644 # specs expanded.
 645 # Note, it does not check for inclusion loops, which cause it
 646 # to never finish - but such loops are invalid for gcc and we're
 647 # assuming gcc is operational.
 648 gcc-specs-directive() {
 649         local directive subdname subdirective
 650         directive="$(_gcc-specs-directive_raw $1)"
 651         while [[ ${directive} == *%\(*\)* ]]; do
 652                 subdname=${directive/*%\(}
 653                 subdname=${subdname/\)*}
 654                 subdirective="$(_gcc-specs-directive_raw ${subdname})"
 655                 directive="${directive//\%(${subdname})/${subdirective}}"
 656         done
 657         echo "${directive}"
 658         return 0
 659 }
 660
 661 # Returns true if gcc sets relro
 662 gcc-specs-relro() {
 663         local directive
 664         directive=$(gcc-specs-directive link_command)
 665         [[ "${directive/\{!norelro:}" != "${directive}" ]]
 666 }
 667 # Returns true if gcc sets now
 668 gcc-specs-now() {
 669         local directive
 670         directive=$(gcc-specs-directive link_command)
 671         [[ "${directive/\{!nonow:}" != "${directive}" ]]
 672 }
 673 # Returns true if gcc builds PIEs
 674 gcc-specs-pie() {
 675         local directive
 676         directive=$(gcc-specs-directive cc1)
 677         [[ "${directive/\{!nopie:}" != "${directive}" ]]
 678 }
 679 # Returns true if gcc builds with the stack protector
 680 gcc-specs-ssp() {
 681         local directive
 682         directive=$(gcc-specs-directive cc1)
 683         [[ "${directive/\{!fno-stack-protector:}" != "${directive}" ]]
 684 }
 685 # Returns true if gcc upgrades fstack-protector to fstack-protector-all
 686 gcc-specs-ssp-to-all() {
 687         local directive
 688         directive=$(gcc-specs-directive cc1)
 689         [[ "${directive/\{!fno-stack-protector-all:}" != "${directive}" ]]
 690 }
 691 # Returns true if gcc builds with fno-strict-overflow
 692 gcc-specs-nostrict() {
 693         local directive
 694         directive=$(gcc-specs-directive cc1)
 695         [[ "${directive/\{!fstrict-overflow:}" != "${directive}" ]]
 696 }
 697 # Returns true if gcc builds with fstack-check
 698 gcc-specs-stack-check() {
 699         local directive
 700         directive=$(gcc-specs-directive cc1)
 701         [[ "${directive/\{!fno-stack-check:}" != "${directive}" ]]
 702 }
 703
 704
 705 # @FUNCTION: gen_usr_ldscript
 706 # @USAGE: [-a] <list of libs to create linker scripts for>
 707 # @DESCRIPTION:
 708 # This function generate linker scripts in /usr/lib for dynamic
 709 # libs in /lib.  This is to fix linking problems when you have
 710 # the .so in /lib, and the .a in /usr/lib.  What happens is that
 711 # in some cases when linking dynamic, the .a in /usr/lib is used
 712 # instead of the .so in /lib due to gcc/libtool tweaking ld's
 713 # library search path.  This causes many builds to fail.
 714 # See bug #4411 for more info.
 715 #
 716 # Note that you should in general use the unversioned name of
 717 # the library (libfoo.so), as ldconfig should usually update it
 718 # correctly to point to the latest version of the library present.
 719 gen_usr_ldscript() {
 720         local lib libdir=$(get_libdir) output_format="" auto=false suffix=$(get_libname)
 721         [[ -z ${ED+set} ]] && local ED=${D%/}${EPREFIX}/
 722
 723         tc-is-static-only && return
 724
 725         # Eventually we'd like to get rid of this func completely #417451
 726         case ${CTARGET:-${CHOST}} in
 727         *-darwin*) ;;
 728         *-android*) return 0 ;;
 729         *linux*|*-freebsd*|*-openbsd*|*-netbsd*)
 730                 use prefix && return 0 ;;
 731         *) return 0 ;;
 732         esac
 733
 734         # Just make sure it exists
 735         dodir /usr/${libdir}
 736
 737         if [[ $1 == "-a" ]] ; then
 738                 auto=true
 739                 shift
 740                 dodir /${libdir}
 741         fi
 742
 743         # OUTPUT_FORMAT gives hints to the linker as to what binary format
 744         # is referenced ... makes multilib saner
 745         local flags=( ${CFLAGS} ${LDFLAGS} -Wl,--verbose )
 746         if $(tc-getLD) --version | grep -q 'GNU gold' ; then
 747                 # If they're using gold, manually invoke the old bfd. #487696
 748                 local d="${T}/bfd-linker"
 749                 mkdir -p "${d}"
 750                 ln -sf $(which ${CHOST}-ld.bfd) "${d}"/ld
 751                 flags+=( -B"${d}" )
 752         fi
 753         output_format=$($(tc-getCC) "${flags[@]}" 2>&1 | sed -n 's/^OUTPUT_FORMAT("\([^"]*\)",.*/\1/p')
 754         [[ -n ${output_format} ]] && output_format="OUTPUT_FORMAT ( ${output_format} )"
 755
 756         for lib in "$@" ; do
 757                 local tlib
 758                 if ${auto} ; then
 759                         lib="lib${lib}${suffix}"
 760                 else
 761                         # Ensure /lib/${lib} exists to avoid dangling scripts/symlinks.
 762                         # This especially is for AIX where $(get_libname) can return ".a",
 763                         # so /lib/${lib} might be moved to /usr/lib/${lib} (by accident).
 764                         [[ -r ${ED}/${libdir}/${lib} ]] || continue
 765                         #TODO: better die here?
 766                 fi
 767
 768                 case ${CTARGET:-${CHOST}} in
 769                 *-darwin*)
 770                         if ${auto} ; then
 771                                 tlib=$(scanmacho -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
 772                         else
 773                                 tlib=$(scanmacho -qF'%S#F' "${ED}"/${libdir}/${lib})
 774                         fi
 775                         [[ -z ${tlib} ]] && die "unable to read install_name from ${lib}"
 776                         tlib=${tlib##*/}
 777
 778                         if ${auto} ; then
 779                                 mv "${ED}"/usr/${libdir}/${lib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
 780                                 # some install_names are funky: they encode a version
 781                                 if [[ ${tlib} != ${lib%${suffix}}.*${suffix#.} ]] ; then
 782                                         mv "${ED}"/usr/${libdir}/${tlib%${suffix}}.*${suffix#.} "${ED}"/${libdir}/ || die
 783                                 fi
 784                                 rm -f "${ED}"/${libdir}/${lib}
 785                         fi
 786
 787                         # Mach-O files have an id, which is like a soname, it tells how
 788                         # another object linking against this lib should reference it.
 789                         # Since we moved the lib from usr/lib into lib this reference is
 790                         # wrong.  Hence, we update it here.  We don't configure with
 791                         # libdir=/lib because that messes up libtool files.
 792                         # Make sure we don't lose the specific version, so just modify the
 793                         # existing install_name
 794                         if [[ ! -w "${ED}/${libdir}/${tlib}" ]] ; then
 795                                 chmod u+w "${ED}${libdir}/${tlib}" # needed to write to it
 796                                 local nowrite=yes
 797                         fi
 798                         install_name_tool \
 799                                 -id "${EPREFIX}"/${libdir}/${tlib} \
 800                                 "${ED}"/${libdir}/${tlib} || die "install_name_tool failed"
 801                         [[ -n ${nowrite} ]] && chmod u-w "${ED}${libdir}/${tlib}"
 802                         # Now as we don't use GNU binutils and our linker doesn't
 803                         # understand linker scripts, just create a symlink.
 804                         pushd "${ED}/usr/${libdir}" > /dev/null
 805                         ln -snf "../../${libdir}/${tlib}" "${lib}"
 806                         popd > /dev/null
 807                         ;;
 808                 *)
 809                         if ${auto} ; then
 810                                 tlib=$(scanelf -qF'%S#F' "${ED}"/usr/${libdir}/${lib})
 811                                 [[ -z ${tlib} ]] && die "unable to read SONAME from ${lib}"
 812                                 mv "${ED}"/usr/${libdir}/${lib}* "${ED}"/${libdir}/ || die
 813                                 # some SONAMEs are funky: they encode a version before the .so
 814                                 if [[ ${tlib} != ${lib}* ]] ; then
 815                                         mv "${ED}"/usr/${libdir}/${tlib}* "${ED}"/${libdir}/ || die
 816                                 fi
 817                                 rm -f "${ED}"/${libdir}/${lib}
 818                         else
 819                                 tlib=${lib}
 820                         fi
 821                         cat > "${ED}/usr/${libdir}/${lib}" <<-END_LDSCRIPT
 822                         /* GNU ld script
 823                            Since Gentoo has critical dynamic libraries in /lib, and the static versions
 824                            in /usr/lib, we need to have a "fake" dynamic lib in /usr/lib, otherwise we
 825                            run into linking problems.  This "fake" dynamic lib is a linker script that
 826                            redirects the linker to the real lib.  And yes, this works in the cross-
 827                            compiling scenario as the sysroot-ed linker will prepend the real path.
 828
 829                            See bug https://bugs.gentoo.org/4411 for more info.
 830                          */
 831                         ${output_format}
 832                         GROUP ( ${EPREFIX}/${libdir}/${tlib} )
 833                         END_LDSCRIPT
 834                         ;;
 835                 esac
 836                 fperms a+x "/usr/${libdir}/${lib}" || die "could not change perms on ${lib}"
 837         done
 838 }
 839
 840 fi